chore(deps)(deps): bump cbor2 from 5.8.0 to 5.9.0 in /backend

Bumps [cbor2](https://github.com/agronholm/cbor2) from 5.8.0 to 5.9.0.
- [Release notes](https://github.com/agronholm/cbor2/releases)
- [Commits](agronholm/cbor2@5.8.0...5.9.0)

---
updated-dependencies:
- dependency-name: cbor2
  dependency-version: 5.9.0
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]